9791149757 has 2 divisors, whose sum is σ = 9791149758. Its totient is φ = 9791149756.

The previous prime is 9791149729. The next prime is 9791149801. The reversal of 9791149757 is 7579411979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8345553316 + 1445596441 = 91354^2 + 38021^2 .

It is an emirp because it is prime and its reverse (7579411979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9791149757 - 2²⁸ = 9522714301 is a prime.

It is a super-2 number, since 2×9791149757² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9791149696 and 9791149705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9791749757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895574878 + 4895574879.

It is an arithmetic number, because the mean of its divisors is an integer number (4895574879).

Almost surely, 2^9791149757 is an apocalyptic number.

It is an amenable number.

9791149757 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791149757 is an equidigital number, since it uses as much as digits as its factorization.

9791149757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5000940, while the sum is 59.

The square root of 9791149757 is about 98950.2387920312. The cubic root of 9791149757 is about 2139.3305732882.

The spelling of 9791149757 in words is "nine billion, seven hundred ninety-one million, one hundred forty-nine thousand, seven hundred fifty-seven".